Core



im. 2o, 13925.

H. F. MARANVILLE CORE 11d Mr 9. vma

2 Sheets-'Sheet 1.

Inventor i'tys,

Harvey E Maranville,

oetc zo, 1925., 1 155mm H. F'. MARANVILLE CORE Filed March 9. 192s 2 Sheets-Sheet 2 Indernior:

.HarveyEMaJw'w/ie, y

` economical and eliicient construction which Patented Oct. 20,i 1925.

UNiTED STATES lHARVEY F.

1,558,381 IPATENT -oF-FicE.

MARANVILLE, OF AKRON,` OHIO, ASSIGNOR TO' TH'MILLER RUBBER COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

CORE.

Appiieaiion ined nareh 9, '1923. serial No. '624,033.

To all whom z't may concern:

Be it known that I, HARVEY F. MARAN- viLLn, a citizen of the United IStates, and resident of Akron, in the county of Summit and State -of.Ohio, have invented certain new and useful Improvements in Cores, of

e which the following is a specification.

My present invention relates to improvements in cores or Joriners designed for use in the building of tires and more particularly suoli as are subsequently vulcanized on air bags.

The invention aims to provide a simple,

may be easily operated, and which will be durable in use.

YVith these and other objects in view, the invention comprises the novel features of construction and arrangement and combination of parts hereinafter described, the nature and scope of my invention being defined and ascertained, by the claims appended hereto. j

An embodiment of the invention is illustrated in the accompanying drawings in which Figure 1 is a front elevation of a former constructed in accordance with my invention.

Fig. 2 is a transverse vertical section. x

Fig. 3 is a detail View of handle and link connection. l j

Fig. 4 shows the hub and arms in side and end elevation.

Fig. 5 shows the locking ringin Side and end elevation partly in section.A

Fig. G is a ectional detail showing the connection between one of the arms and the core members (4 and 6).

Fig. 7 shows. side and front elevation of the carrying shaft bushing, and

Fig. 8 shows the retaining ring in edge and side views.

Referring by reference characters to these drawings, the numeral l designates a hub member which is provided with spokes or arms 2 and 3, which support at their outer ends a seginentalor arc-shaped core section 4, which`inay be of the ordinary -or any desired exterior configuration when viewed l in cross section.

The arms are provided with oii'set portions whicli are connected to the core section and these offset portions are preferably form-ed in the shape of independent members or brackets 2a and 3a which have portions a secure-d by tapscrews or other suitable means to the outer ends of the arms.

The brackets have laterally extending portionsl a which in turn carry portions a2 of iiat or web shape, lwhich extend radially outward 'and are connected to the core sections 4'by entering grooves 4a cut, inthe ends of the core sections and being inned therein as shown, by pins a3 ypassing t rough the web and through lugs, on the core sections.

Core sections 5 and 6 are hinged to the opposite ends of the section 4 so as to be capable of being swung inward in the plane of the core. vMy preferred form of hinge is formed by making the webs a2 wide enough to project beyond the ends of the core section 4 and enter grooves formed in the eli-ds ot said sections 5 and 6, said sections bein hinged to the webs by means of pins 7 an 8 passing through the webs and through the spaced ears or lugs 5a and 6 which lie on opposite sides of the web.

Preferably the angle iron formed by the parts a and a. is braced by a web portion a5. A fourth section 9 is provided to complete the circular shape of the core or former, and this section constitutes a key section, the lines of juncture between the ends of this section yand the adjoining ends yol? sections 5 and 6 being lnon-radial, and preferably slightl f flaring inwardly to permit the ready wit ldrawal of the key section. This section is whollyy detachable, being intended to be placed in position and withdrawn by hand, and to insure its being held in perfect alignment with the adjacent sections, tlie abutting ends are provided with interlocking tongues and grooves, as is customary in tire cores. For holding the key section against radial movement when in' place between the ends of the adjoining hinged sections, said key section is prol vided with a bifurcated bracket 10 extending inwardly towards the axis o'the hub, which is provided with handles 11 and 12 designed to be grasped by the operator to enable him to readily remove and replace the key section.

During the building of the tire, the key section is held a ainst radial displacement relative to the' 'a jacent sections, by a link Ves l membe i., or strut 13, which has its inner ends pivoted between lugs l1li on the hub by means of pivot pin 14a. Y l

One of the handles (11) is rigidly connected -to lug 10 in any suitable manner, as by having a threaded portion 11"L tapped into the lug from one side, while the other handle is preferably utilized as a locking means for connecting the outer end of the link or strut to the lug 10. This is accomplished Vby providing a hollow bushing 12@L having la threaded portion tapped into an opening in the lug, the bushing having a stop collar 12b and a segmental flange 12C, and having a reduced bore at its outer end forming an internal shoulder 12d. The handle is recessed at its inner end to receive the outer end of the bushing and has a reduced bore which receives the outer end of a pin or rod 12e which is secured thereto in any suitable manner, as by riveting. l

A spring 12t surrounds the pin or rod 12e, its inner end bearing against an annular flange e on the rod 12e, while its outer end bears against the shoulder formed by the reduced outer portion of the bore of the bushing. The spring is thus held under compression and tends to press the locking pin inwardly or tothe left, Fig. 1, to cause its free end to engage an eye or opening in the free end of the link or strut 13, (Fig. 1).

One-half of the inner end of the handle is cut away as indicated at 12g so that in one position of the handle the cut away portion lies opposite the segmental flange 12c and the handle is free to be moved inwardly by the spring to cause the locking pin to enter the eye of theV strut, but when the handle 1s pulled out and given a partial turn, the pin will be held in unlocked position by reason of engagement of the segmental inner end of the handle with the segmental flange 12C, as shown in Fig. 3.

The hub may be rotatably mountedupon any suitable support, which, as it forms no art of the present invention, is represented y the broken shaft 20. -I prefer, however, to provide a detachable connection between the hub and carrying member by which the hub will be firmly locked'to thegshaft during operation, lbut may be readily removed to enable another core or mandrel to be substituted for the oneV previously carried thereby.

To this en d I provide the hub with a central bore l, preferably tapered or flared in part, to cooperate with a bushing l5 permanently carried -by the end ofv the shaft or spindle 20. Hub 1 and bushing 15 are provided with cooperating flanges 1b and 15b, one of these parts, 15b for example, carrying dowel pins 15c which cooperate with dowel openings 1 in the other part. A flanged ring 16` is rotatably mounted on the flange 15b and retained thereon by 'a retaining ring 17, and may be provided with a convenient operating handle indicated at 16a. The locking ring is provided with inwardly projecting spaced radial lugs, or segmental flanges 16" (Fig. 5) equi-distantly arranged and designed to cooperate with similar lock` ing lugs 1d (Fig. 4) carried by the flange 1b of the hub, and it willbe seen that when the hub has been placed with its flange 1b against the flange 1 5?, a partial rotation of the locking ring will cause the lugs 16b thereof to overlie the lugs 1d. and hold the parts firmly together against axial displacement, circumferential displacement being prevented by the dowel pins above referred to. lVhen it is desired to remove the core, it is only necessary to impart a reverse rotation to thelocking ring, bringing the lug 16b in alignment with the spaces between the lugs 1d.

In order to take up any looseness in the connections, when the parts are in interlocking engagement, and hold the' hub firmly in place, I provide a plurality of clamping boltsl 18a which pass through the ring 16 approximately centrally of the lugs 16b and through elongated peripheral recesses 15f in the flange 15, the portions of the ring overlying the flange 1b being preferably thickened or projectedinwardly, as indicated at 16f. vBolts 1Sa are provided with cylindrical nuts 18 having operating handles 18h, and the nuts are designed to pass through semi-circular recesses 17 a in the locking ring 17 and thus bear against the outer or lefthand face (Fig. 2) of flange 15b and draw the parts firmly together, taking up any looseness and preventing rotation -of the locking ring by the frictional engagement, suoli rotation of the locking ring being further and positively prevented by the engagement of the nuts with the recesses 17a of the ring 17.

Having thus described my invention what I claim is:-

1. A collapsible mandrel for use in manufacturing pneumatic tires, comprising a hub member, a core segment rigidly carried thereby, a core segment hinged to each end of said first named segment, a key segment cooperating with the free ends of said hinged segments, a lug projecting inwardly from said key segment and having a bifurcation, and a strut pivotally connected t0 said hub member and having its otherend detachably' engaging said bifurcation.

2. A collapsible mandrel for use in manufacturing pneumatic tires, comprising a hub member, a core segment rigidly carried thereby, a core segment hinged to each end of said first named segment, a key segment cooperating with the free i ends of said hinged segments, a lug projecting inwardly from said key segment and having a bifurcation, a str-utV pivotally connected to said 'ably engaging said bifurcation, a handle member carried at one side of said lug, and locking means for said strut controlled by said handle.

4. A' collapsible mandrel for use in -manufacturing pneumatic tires, comprising a hub member, a core segment rigidly carried thereby, a core segment hinged to each end of'said first named segments, a key segment cooperating with the free ends of' said hinged segments, a lug projecting inwardlyl from said key segment and having a bifurcation, a strut pivotally connected to said hub member and having its other end detachably engaging said bifurcation, said lug having an opening through one of the walls of the bifurcated portion, a spring pressed locking pin located in said opening for engaging an opening in the strut, and a handle member connected in said pin.

5. A collapsible mandrel for use in manufacturing pneumatic tires, comprising a hub member, a coreI segment rigidly carried thereby, a core segment vhinged to each end of said first named segments, a key segment cooperating with the free ends of said hinged segments,4 a, lug projecting inwardly from said key segment and having a bifurcation, a' strutpivotally connected to said hub member and having its other end detachably engaging said bifurcation, a bushing carried by one of the bifurcat d portions'of the lug and having a segmentl l portion, a handle member having a cooperating segmental portion, and a locking pin carried by said handle member for engaging said strut.

6. In apparatusof` the .class described, a hub member, rigid arms carried thereby having laterally offset portions, a core section rigidly secured to said offset portions, core sections having en ds hinged to the ends of said first named portions and having free ends, a key section cooperating with said free ends, and detachable means for holding said key section in position, said hub and said arms lying wholly to one side of' the plane of the core, whereby he space within the core is entirely unobstructed. v l

7 In apparatus of the class described, a hub member, rigid armsI carried thereby having laterally offset portions, a core section rigidly secured to said offset portions, core sections lhaving ends hinged to the ends of said rst named portions and having free ends, a key section cooperating with said free ends and detachable lrneans'for connecting said key section ,to said hub, said hub and said arms lying wholly to one side of the plane of the core, whereby the space within the coreI is entirely unobstructed.

8. In apparatus of the class described, a hub section, rigid arms carried thereby hav-- ing web shaped'oflset portions, a core section having slots to receive-said webs, said webs projecting from'the endsof said slots, and said core section being Arigidly secured tosaid webs, a pair of complementary sections having slots in their ends to receive the projecting portionsaif said webs, and said complementary sections being hinged to said webs, a key section-cooperating with said complementary sections, and means for de.- tachably securing said key section in place.

9. In apparatus of the class described, a hub section, rigid arms carried thereby havj ing web shaped offset portions, a core section having slots to receive said webssaid webs projecting from the/ends of said slots, and saidcore section being rigidly secured to saidwebs, a pair of complementary sections having slots in their ends to receive the projecting portions of said webs, said webs having portions lying inside of the inner edge of the complementary core sections; and said complementary core sections having inwardly projecting lugs embracing said web portions, hinge pins passing through said lugs and web portions, and a key` section .cooperating with said complementary sections. y v

10. In combination, a hollow hub, a mandrel carried'thereby, a supporting spindlehaving a collar to lit said hub, said hub and said ycollar` having abutting portions pro- .vided with` inter-engaging means to prevent j relative rotation, and means for detachably 110 locking said hubsand collar together.

1l. In combination, a hollow hub, a mandrel carried' thereby, a supportin spindle having a collarto fit said hub, sai hub and said collar having outwardly projecting 115 abutting flanges provided with inter-engag- -ing means to prevent relative rotation, onethe other flange and having inwardly extending projections overlying said peripheral lugs, bolts passing through transverse openings in said ring outside the ends of the flange on said collar, and nuts on said bolts, and a retaining ring removably secured to said Clamping ring and overlying' the eX- posed face of said flange on the collar, said retaining ring having recesses to receive said nuts. 10

In testimony whereof, I affix my signature.

HARVEY n. MARANVILLE. 

